I'd like to hook my arduino up to my existing home security system so that I can monitor and control it from the web. I've got a computer systems degree so in school I did some work with micro-controllers and circuits as well as programming. I don't know the best approach to figure out pinouts, reverse engineer the communication protocols, and where to look for existing information on similar projects. Since it is an active security system I'm a bit leery about just sending different signals to see what works.
I figure I'll need a multimeter at the least. I'm hoping the signals aren't particularly complex - if they are what's the best way to approach it? The unit is a Broadview (ADT) board. I'd like to basically just make the touch panel inside my house available from the web. I think I can handle the web security consequences of doing that.
What's the best way to start this project? I haven't found anything similar.